Structural Performance of Hybrid GFRP/Steel Concrete Sandwich Panels
Publication: Journal of Composites for Construction
Volume 12, Issue 5
Abstract
Precast/prestressed concrete sandwich panels consist of two concrete wythes separated by a rigid insulation foam layer and are generally used as walls or slabs in thermal insulation applications. Commonly used connectors between the two wythes, such as steel trusses or concrete stems, penetrate the insulation layer causing a thermal bridge effect, which reduces thermal efficiency. Glass fiber-reinforced polymer (GFRP) composite shell connectors between the two concrete wythes are used in this research as horizontal shear transfer reinforcement. The design criterion is to establish composite action, in which both wythes resist flexural loads as one unit, while maintaining insulation across the two concrete wythes of the panel. The experiments carried out in this research show that hybrid GFRP/steel reinforced sandwich panels can withstand out-of-plane loads while providing resistance to horizontal shear between the two concrete wythes. An analytical method is developed for modeling the horizontal shear transfer enhancement using a shear flow approach. In addition, a truss model is built, which predicts the panel deflections observed in the experiments with reasonable accuracy.
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Acknowledgments
The writers are grateful to Eagle Precast Inc. for assistance in building the test units. The writers acknowledge the donation of materials by Sika Corp., Air Logistics Corp., and Bayer MaterialScience. The writers acknowledge the assistance of Mark Bryant, Dr. Zihan Yan, and Professor Dan Adams of the University of Utah. The writers acknowledge the constructive comments of the reviewers.
References
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 12 • Issue 5 • October 2008
Pages: 570 - 576
Copyright
© 2008 ASCE.
History
Received: Apr 4, 2007
Accepted: Nov 28, 2007
Published online: Oct 1, 2008
Published in print: Oct 2008
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